SHU43C02UC-46 half inch of sudsy water
Okay great ! the problem you are having is a very common issue with these machines.Your water inlet valve is bad. your not getting enough water so the soap wont dissolve. you will need to order and replace the valve. below is a link to order it. These valves run around $31.00.
link to valve ---- http://www.repairclinic.com/PartDetail/Water-Inlet-Valve/607335/1386463?modelNumber=SHU43C02UC%2F46 make sure your water shutoff under the sink is open fully before ordering a new valve, thanks and have a great weekend ! Bryan